Man on treadmill

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Size: 5200px × 3457px
Photo credit: © Moonbrush / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: basic, building, circular, construction, effort, gearing, hoisting, ladder, lifting, load, machine, man, mason, medieval, method, power, pulley, reconstruction, rope, simple, spokes, stone, stonework, sweating, technique, timber, treadmill, walking, wheel, working